Class AbstractLobCreatingPreparedStatementCallback
- java.lang.Object
- org.springframework.jdbc.core.support.AbstractLobCreatingPreparedStatementCallback
- All Implemented Interfaces:
PreparedStatementCallback<Integer>
public abstract class AbstractLobCreatingPreparedStatementCallback extends Object implements PreparedStatementCallback<Integer>
AbstractPreparedStatementCallback
implementation that manages aLobCreator
. Typically used as inner class, with access to surrounding method arguments.Delegates to the
setValues
template method for setting values on the PreparedStatement, using a given LobCreator for BLOB/CLOB arguments.A usage example with
JdbcTemplate
:JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); // reusable object LobHandler lobHandler = new DefaultLobHandler(); // reusable object jdbcTemplate.execute( "INSERT INTO imagedb (image_name, content, description) VALUES (?, ?, ?)", new AbstractLobCreatingPreparedStatementCallback(lobHandler) { protected void setValues(PreparedStatement ps, LobCreator lobCreator) throws SQLException { ps.setString(1, name); lobCreator.setBlobAsBinaryStream(ps, 2, contentStream, contentLength); lobCreator.setClobAsString(ps, 3, description); } } );
- Since:
- 1.0.2
- Author:
- Juergen Hoeller
- See Also:
LobCreator
Constructor Summary
Constructors Constructor Description AbstractLobCreatingPreparedStatementCallback(LobHandler lobHandler)
Create a new AbstractLobCreatingPreparedStatementCallback for the given LobHandler.
Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description Integer
doInPreparedStatement(PreparedStatement ps)
Gets called byJdbcTemplate.execute
with an active JDBC PreparedStatement.protected abstract void
setValues(PreparedStatement ps, LobCreator lobCreator)
Set values on the given PreparedStatement, using the given LobCreator for BLOB/CLOB arguments.
Constructor Detail
AbstractLobCreatingPreparedStatementCallback
public AbstractLobCreatingPreparedStatementCallback(LobHandler lobHandler)
Create a new AbstractLobCreatingPreparedStatementCallback for the given LobHandler.- Parameters:
lobHandler
- the LobHandler to create LobCreators with
Method Detail
doInPreparedStatement
public final Integer doInPreparedStatement(PreparedStatement ps) throws SQLException, DataAccessException
Description copied from interface:PreparedStatementCallback
Gets called byJdbcTemplate.execute
with an active JDBC PreparedStatement. Does not need to care about closing the Statement or the Connection, or about handling transactions: this will all be handled by Spring's JdbcTemplate.NOTE: Any ResultSets opened should be closed in finally blocks within the callback implementation. Spring will close the Statement object after the callback returned, but this does not necessarily imply that the ResultSet resources will be closed: the Statement objects might get pooled by the connection pool, with
close
calls only returning the object to the pool but not physically closing the resources.If called without a thread-bound JDBC transaction (initiated by DataSourceTransactionManager), the code will simply get executed on the JDBC connection with its transactional semantics. If JdbcTemplate is configured to use a JTA-aware DataSource, the JDBC connection and thus the callback code will be transactional if a JTA transaction is active.
Allows for returning a result object created within the callback, i.e. a domain object or a collection of domain objects. Note that there's special support for single step actions: see JdbcTemplate.queryForObject etc. A thrown RuntimeException is treated as application exception, it gets propagated to the caller of the template.
- Specified by:
doInPreparedStatement
in interfacePreparedStatementCallback<Integer>
- Parameters:
ps
- active JDBC PreparedStatement- Returns:
- a result object, or
null
if none - Throws:
SQLException
- if thrown by a JDBC method, to be auto-converted to a DataAccessException by a SQLExceptionTranslatorDataAccessException
- in case of custom exceptions- See Also:
JdbcTemplate.queryForObject(String, Object[], Class)
,JdbcTemplate.queryForList(String, Object[])
setValues
protected abstract void setValues(PreparedStatement ps, LobCreator lobCreator) throws SQLException, DataAccessException
Set values on the given PreparedStatement, using the given LobCreator for BLOB/CLOB arguments.- Parameters:
ps
- the PreparedStatement to uselobCreator
- the LobCreator to use- Throws:
SQLException
- if thrown by JDBC methodsDataAccessException
- in case of custom exceptions